recognizing chemical changes (pages 56-57)
6. a ________ change occurs when a substance reacts and forms one or more new substances. circle the correct answer.
distillation physical chemical
7. circle the letters of examples of evidence for a chemical change.
a. a change in color
b. a filter trapping particles
c. the production of a gas

match each example to evidence of a chemical change.
example
____ 8. lemon juice is added to milk.
____ 9. a silver bracelet darkens when exposed to air.
____ 10. vinegar is mixed with baking soda.
chemical change
a. the production of a gas
b. the formation of a precipitate
c. a change in color

is a change chemical or physical? (page 58)
11. is the following sentence true or false? when iron is heated until it turns red, the color change shows that a chemical change has taken place.
________________
12. during a chemical change the composition of matter ________________, but during a physical change, the composition of matter ________________.
13. complete the following table about chemical changes.
chemical changes
type of change | are new substances formed? | example
chemical | yes |
physical | | sugar dissolving in water

Question

recognizing chemical changes (pages 56-57)
6. a ________ change occurs when a substance reacts and forms one or more new substances. circle the correct answer.
distillation physical chemical
7. circle the letters of examples of evidence for a chemical change.
a. a change in color
b. a filter trapping particles
c. the production of a gas

match each example to evidence of a chemical change.
example
____ 8. lemon juice is added to milk.
____ 9. a silver bracelet darkens when exposed to air.
____ 10. vinegar is mixed with baking soda.
chemical change
a. the production of a gas
b. the formation of a precipitate
c. a change in color

is a change chemical or physical? (page 58)
11. is the following sentence true or false? when iron is heated until it turns red, the color change shows that a chemical change has taken place.
________________
12. during a chemical change the composition of matter ________________, but during a physical change, the composition of matter ________________.
13. complete the following table about chemical changes.
chemical changes
type of change | are new substances formed? | example
chemical | yes |
physical | | sugar dissolving in water

Accepted Answer

{ "quality": "clear", "question_count": 8, "skills_matched": [ "step_cot", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Chemical Changes", "Physical Changes" ], "new_concepts": [], "current_concepts": [ "Chemical Changes", "Physical Changes", "Chemical Properties", "Physical Properties" ] } ## Identify chemical change definition Using the *Chemical Changes* knowledge point $$ \text{A chemical change occurs when a substance reacts and forms one or more new substances.} $$ ## Identify evidence of chemical change Using the *Chemical Changes* knowledge point $$ \begin{aligned} &\text{Evidence includes: change in color, production of a gas, formation of a precipitate.} \ &\text{Filtering trapping particles is a physical separation method.} \end{aligned} $$ ## Match examples to evidence Using the *Chemical Changes* and *Physical Changes* knowledge points $$ \begin{aligned} &\text{8. Lemon juice added to milk (curdling) } ightarrow \text{b. the formation of a precipitate} \ &\text{9. Silver bracelet darkening (tarnishing) } ightarrow \text{c. a change in color} \ &\text{10. Vinegar mixed with baking soda (fizzing) } ightarrow \text{a. the production of a gas} \end{aligned} $$ ## Evaluate physical heating vs chemical change Using the *Physical Changes* knowledge point $$ \begin{aligned} &\text{Heating iron until red is a physical change (glow due to temperature, no new substance).} \ &\text{Therefore, the statement is False.} \end{aligned} $$ ## Compare composition changes Using the *Chemical Changes* and *Physical Changes* knowledge points $$ \begin{aligned} &\text{During a chemical change, the composition of matter changes.} \ &\text{During a physical change, the composition of matter remains the same.} \end{aligned} $$ ## Complete the comparison table Using the *Chemical Changes* and *Physical Changes* knowledge points $$ \begin{aligned} &\text{Chemical Change: New substances formed? Yes. Example: Iron rusting / Wood burning.} \ &\text{Physical Change: New substances formed? No. Example: Sugar dissolving in water.} \end{aligned} $$ ## Question 6 A chemical change occurs when a substance reacts and forms one or more new substances. ## Question 7 Circle the letters of examples of evidence for a chemical change. a. a change in color

b. a filter trapping particles

c. the production of a gas ## Question 8 Lemon juice is added to milk. b ## Question 9 A silver bracelet darkens when exposed to air. c ## Question 10 Vinegar is mixed with baking soda. a ## Question 11 Is the following sentence true or false? When iron is heated until it turns red, the color change shows that a chemical change has taken place. false ## Question 12 During a chemical change the composition of matter changes, but during a physical change, the composition of matter remains the same. ## Question 13 | Type of Change | Are New Substances Formed? | Example | | :--- | :--- | :--- | | Chemical | Yes | Rusting of iron | | Physical | No | Sugar dissolving in water | { "subject": "Natural Science", "question_type": "Multi-part", "knowledge_point": [ "Natural Science", "Chemistry", "Chemical and Physical Changes" ] }

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Identify chemical change definition

Identify evidence of chemical change

Match examples to evidence

Evaluate physical heating vs chemical change

Compare composition changes

Complete the comparison table

Answer:

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13